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Cisco Bug: CSCvu65527 - BGP packets sent with invalid label after SR route change

Last Modified

Jul 14, 2020

Products (65)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 3548-X Switch
  • Cisco Nexus 92348GC-X Switch
  • Cisco Nexus 3548 Switch
  • Cisco Nexus 93600CD-GX Switch
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 3636C-R Switch
  • Cisco Nexus 9396TX Switch
  • Cisco Nexus 3548-XL Switch
  • Cisco Nexus 3132Q-V Switch
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Known Affected Releases


Description (partial)

If there is an MPLS-labeled route, and another route appears for the same prefix that doesn't require an MPLS label to be imposed before the previous route is withdrawn, packets sent by the BGP process or by "telnet x.x.x.x 179" to that destination still have the old MPLS label on them. Since there is no LSP, they are dropped. Pings or packets to any other ports are not affected.

Any software versions from 9.2.1 until the ones mentioned in "fixed releases" are affected.
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